Edge guide for a textile web

ABSTRACT

A sewing machine includes two machine halves spaced from one another and each provided with respective tongues capable of displacing pieces of the material web previously cut into pieces on a conveyor, the conveyor being provided with guide rails, one of the rails being formed with a starting portion inclined along and transverse to a travel direction of the conveyor, so that each of the pieces of the web received by the conveyor is delivered to a sewing machine with respective longitudinal edges bent upwardly with respect to a main portion of the web, preventing thereby unraveling the weft upon cutting the web by inherent gravity forces.

CROSS REFERENCE TO RELATED APPLICATION

This application is a national phase application of PCT/DE90/00911 filedand based upon a German Application filed under the InternationalConvention.

FIELD OF THE INVENTION

The invention relates to an edge guide for a textile web in a sewinginstallation for the automatic finishing of textile products withtrimmed ends, wherein the textile web is wound on a cloth beam.

BACKGROUND OF THE INVENTION

A sewing installation of this type is the object of German Patent 37 10025. This sewing installation has proven to be most efficient in theautomatic production of textile products with finished ends, whereby itis particularly advantageous that several webs can be taken up at thesame time from the cloth beam. However, it has been found that in theprocessing of coarse goods with thick weft threads, such as usedparticularly in scouring cloth, difficulties arise because of thetendency of the weft threads to detach themselves from the fabric, sothat the edges can not be perfectly finished.

OBJECTS OF THE INVENTION

It is the object of the invention to provide an apparatus for preventingthe detachment of weft threads at the edge of textile products.

According to the invention an apparatus for cutting pieces from anelongated web, so that each of the pieces is formed with respectivehemmed longitudinal sides, and for delivering the pieces toward a sewingmachine, the apparatus comprising:

storing means including a cloth beam with a web wound thereon;

transport means receiving the web from the beam for transporting the webdownstream along a web path in a first upstream-downstream direction;cutting means including a separator movable transversely to the firstdirection for cutting pieces from the web along the path;

an upstream machine half provided with respective pick-up meansincluding respective tongue movable reciprocally parallel to the firstdirection and communicating with the separator for sequentially clampingthe pieces of the web;

a downstream machine half spaced downstream of the upstream machine halfalong the web path and provided with respective pickup means includingrespective tongues movable reciprocally parallel to the first directionand communicating with the respective tongues of the upstream half forfurther advancing the pieces along the web path;

conveyor means including a longitudinal endless conveyor movable in asecond upstream-downstream direction along a piece path transversely tothe first direction and having a respective upstream part flanked by themachine halves, the conveyor receiving sequentially the pieces from themachine halves, the conveyor receiving sequentially the pieces from thetongues; and

guiding means extending along the second direction substantially betweenthe cutting means and the sewing machine for guiding respectivelongitudinal edges of each of the pieces transported by the conveyor,the guiding means being provided along opposite longitudinal flanks ofthe conveyor and including:

a pair of edged rails extending parallel to the conveyor, and

a pair of abutment rails, each of the abutment rails being provided witha respective upstream portion inclined along and transversely to thesecond direction, so that respective longitudinal hemmed sides of eachof the pieces are bent upwardly at a right angle with respect to a mainportion of the web.

As a result of the steps taken by the invention, the thick weft threadsat the edge of the textile product are prevented from leaving the bondof the fabric consisting of warp and weft. By raising the textile edgein a simple manner, perfectly neat edges result, a success which isachieved by surprisingly simple structure of the device according to theinvention.

BRIEF DESCRIPTION OF THE DRAWING

The above and other objects, features, and advantages will become morereadily apparent from the following description, reference being made tothe accompanying drawing in which:

FIG. 1 is an end view of the right and the left machine halves I and IIwith the advance or pickup tongs;

FIG. 2 is the right and the left machine halves with a top view of thetongs and the belts;

FIG. 3 is a general top view of the sewing installation with the settingdevice for the edges of the textile web;

FIG. 3a is a lateral view of the setting device;

FIG. 4 is a detailed view of the setting device; and

FIGS. 5 and 6 the cooperation of the clamping device for the textile webwith the setting device.

SPECIFIC DESCRIPTION

FIG. 1 shows a lateral view of the right machine half I and the leftmachine half II. The textile web 1 coming from the cloth beam is takenup by the advance tong 2 and moved towards the machine middle o in afirst conveying direction. Thereby the textile web 1 reaches the plane mof the cutting device 50 with its belt pairs 11, 12, which serve for thetransport and driving of the disk cutter 51. On both sides of themachine middle o, clamping devices are provided and work in thedirection of the longitudinal conveyor 14 in a direction perpendicularto the plane of paper and consist for instance of two belt pairs 7, 8and 9, 10. Laterally with respect to the separating device the rails 18,19 of the setting device 20 are shown. In the left machine half II onecan discern the pickup tong 3, also the clamping device with the beltpairs 9, 10 and the rails 18, 19 of the setting device 20.

FIG. 2 shows a top view of the tongs 2, 3, with their fingers 4, 5 andthe belt pairs 7, 8 and 9, 10, whereby the fingers 4, 5 engage eachother at 6 in the machine middle o.

FIG. 3 shows a top view of the general layout of the sewinginstallation. The textile web 1 is moved by both tongs 2, 3 in the firstconveying direction to the machine middle o, where it is transferred tothe longitudinal conveyor 14. The longitudinal conveyor 14 transportsthe textile web 1 in the direction of the arrow to the sewing machine13, where it is hemmed and sewn. The setting device 20 is arranged onboth sides of the longitudinal conveyor 14 supporting the textileproducts such as scouring cloth, namely between the left end--as shownin drawing--of the separating device and the sewing installation withthe sewing machines 13. The setting device 20 consists respectively ofan abutment rail 18 and an edged rail 19.

FIG. 3a is a lateral view of the setting device 20 with the textile web1 running vertically with respect to the plane of the drawing and withthe abutment rail 18 and the edged rail 19. The abutment rail 18 has atits beginning an inclined starting edge.

FIG. 4 shows a detailed view of the setting device 20. The textile web 1is in a clamped position between the belts 9, 10. The edge of thetextile web 1 is bent upwards (at 1a), in the area of the abutment rail18. The abutment rail 18 is fastened to the side wall of the machine byspacers. The same applies to the edged rail 19.

FIGS. 5 and 6 show the cooperation between the clamping device forinstance at the belt pairs 9, 10 for the textile web 1 and the settingdevice 20. Thereby, the abutment rail 18 and the edged rail 19participate in the up and down movement of the rollers causing theclamping action of the belts. FIG. 5 shows the open position, while FIG.6 shows the clamping position, wherein the belts 9, 10 clamp down on thetextile web 1 and both rails 18, 19 are in working position.

Advantageously, the edge guide according to the invention could bearranged already in the cutting station itself. Since the rigid rail 18is lower than the bottom edge of the edged rail 19, the rail 18 can runthrough. The edged rail 19 can not fall all the way down, since it comesto rest against the rigid abutment rail 18.

I claim:
 1. An apparatus for cutting pieces form an elongated web, sothat each of said pieces is formed with respective hemmed longitudinalsides, and for delivering the pieces toward a sewing machine, saidapparatus comprising:storing means including a cloth beam with a webwound thereon; transport means receiving the web from said web fortransporting the web downstream along a web path in a firstupstream-downstream direction; cutting means including a separatormovable transversely to said first direction for cutting pieces fromsaid web along said path; an upstream machine half provided withrespective pickup means including respective tongues movablereciprocally parallel to said first direction and communicating withsaid separator for sequentially clamping said pieces of the web; adownstream machine half spaced downstream of said upstream machine halfalong said web path and provided with respective pickup means includingrespective tongues movable reciprocally parallel to said first directionand communicating with the respective tongues of the upstream half forfurther advancing said pieces along said web path; conveyor meansincluding a longitudinal endless conveyor movable in a secondupstream-downstream direction along a piece path transversely to saidfirst direction and having a respective upstream part flanked by saidmachine halves, said conveyor receiving sequentially said pieces fromsaid machine halves, said conveyor receiving sequentially said piecesfrom said tongues; and guiding means extending along said seconddirection substantially between said cutting means and the sewingmachine for guiding respective longitudinal edges of each of said piecestransported by said conveyor, said guiding means being provided alongopposite longitudinal flanks of said conveyor and including:a pair ofedged rails extending parallel to said conveyor, and a pair of abutmentrails, each of said abutment rails being provided with a respectiveupstream portion inclined along and transversely to said seconddirection, so that respective longitudinal hemmed sides of each of saidpieces are bent upwardly at a right angle with respect to a main portionof the web.